Stapling device



Dc. 2'0, 1938. vw. G. PANKONIN l 2,140,592

STAPLING DEVI C E Filed lay 7, 1956 J1 Il? 1 I V Patented Dee. 20, .i938

'UNITED ,STATES- PATENT OFFICE William G. Pankonin, Chicago, IIL-animar to Ace Fastener Corporation, Chicago, Ill., a corporation of Illinois Application May '1, 193s, sensi No. 18,301

5 Claims.

This invention relates to an improvement in stapling machines.

The present invention is ,a continuation in lpart o'i' the copending application of William G. Pankonin, applicant herein, Serial No. 585,241, tiled January 7, 1932, for Stapling device.

One of the objects of this invention is to provide in a stapling machine yan anvil adapted to clench the legs oi' a staple on the underside of material through which the staple is inserted, in a variety of selected forms.

Another object ofl the invention is to provide a simplified means for adjvustably positioning a staple clenching anvil in selected relation to the staple driving mechanism.

Other objects and vadvantages reside in certain novel features of the construction, arrangement and combination of parts which'will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawing forming a part of this specification, and in which:

Figure Lis a view in side elevation, with a part broken away for .the sake of clarity, illustrating a stapling machine embodying the present invention;

Figure 2 is an enlarged fragmentary plan view vof the anvil and base shown in Figure 1;

Figures 3,'4, 5.and 6 are views in vertical section taken on lines 3-3, 4-4, 5-5 and 6 6, respectively, of Figure 2; and

Figure 7 is an enlarged fragmentary view partly in longitudinal section and partly in side elevation showing an anvil embodying a modified form of the present invention.

Referring to the drawing, it will be'seen that the stapling machine comprises generally a base I, an arm 2 mounted on4 the base for kmovement toward and away therefrom,rand comprising a magazine for staples, ahousing 3 enclosing staple driving mechanism (not shown) mounted on said arm and al plunger 4 carried by said housing and operable to cause staples to be driven from the vmagazine out through the ejection chute E against the anvil 5. The anvil 5 is adjustably supported on the base i beneath the staple driving mechanism.

The construction and operation of the arm 2, housing 3 and plunger 4 is well known to those skilled in the art and does not constitute a part of this invention` In the operation of the de.

vice, successively depressing the plunger 4 causes staples to be driven from the magazine out through the ejection chute E. During the driving action the lower edge of the ejection chute E is depressed and engages between itself and the upper surface of anvil 5 material inserted for the purpose of being stapled and the legs of the staple pass through the material, strike against the anvil 5 and are clenchedor deformed as will be hereinafter described.

The base I is of customary design except that at the front or anvil supporting end thereof the undersideof the base is provided with a cavity or operating'space 8 providing clearance room for related parts of the adjustable anvil 5.

The upper surface of anvil 5 has transversely arranged therein a plurality of parallel staple deforming dies or clenching cavities. One set of dies 1 and 'ln is arranged to bend each leg of the staple inwardly toward the other leg to permanently clench the staple. Another set of dies 8 and 8 is arranged to bendone leg of the stapley vinwardly and the other leg outwardly. `The remaining set of dies S'and 9'L is arranged to ybend both the legs of the staple outwardly. The sets act independently of each other and only one set is operable at a time. To cause a set to be 0D- erable, the anvil is movable with respect to the ejection chute E to aline a selected set of dies therewith.

To adjustably support the anvil 5 on the base i, permit its movement longitudinally thereof while maintaining it in proper lateral alinement with the ejection chute E and to position it with a selected set of clenching dies in operative relation with the driving mechanism, the anvil 5 has hearing portions in contact with the upper surface of the base i and is provided with tongues or lugs i0 and I0 which project downwardly ,through slots II and il* formed in the base i. Below the surface of the base i, within the 4operating space 6, and. extending between the downwardly projecting tongues i0 land Iiia is a spring I2 which is biased so that its central portion bears against the inner or lower surface of the base to cause the anvil by its bearing por' tion to fricti'onally engage the upper surface of the base.

The central portion of the anvil may be elevated if desired. With or without the central portion elevated, the slots il and Ila are formed With less width than the front and rear edges of the anvil 5 and the tongues l0 and Illa are a close but slidingv fit within the slots Il and Ila and are positioned centrally with respect to the front and rear .edges of the anvil 5. With the central portion of the anvil elevated, the portions of the front and rear edges of the anvil 5 extending beyond =the width of the tongues i il and II)l rest uponthe upper surface of the base I adjacent Iz the slots II and II and provide the bearing portions lfor the anvil 5. The reaction between the tongues and the side edges of the slots II and IIa maintain the anvil in proper lateral. alinement during its longitudinal movement. The tongues I and II'IL are provided with notches inl the sides thereof asindicated at I8 and I3. The vedges of the ends of the spring I2 are notched inwardly as at I4 and I4, the notches in the spring and the notches in the tongues permitting each end of the spring to interlock with a respective tongue. The spring is of suiflcient length so that when inserted between thetongues I0 and IIJ* its central portion is biased in an upward direction and bears against the undersurface of the base I.

If only two sets of deforming dies are to be used the slots II and Ila are so positioned that the abutment between the tongues and the rear edges of the respective slots causes' an accurate positioning of one set of dies with respect to the ejection chute E while the abutment between the tongues and the forward edges of the respective slots accurately alines the other set of deforming dies. 'I'he friction caused by the spring acting between the anvil and the base is sulicient to maintain the anvil in either one of these selected positions.

When more than two sets of. dies are to be used as indicated in Figure 2 the base adjacent the side edges of slot II is provided with a plurality of teeth and grooves indicated generally at I5 and I5, The forward edge of the anvil 5 adjacent the tongue I0 is provided with a downwardly facing tooth-like edge I6 (Figure 4) which registers with the teeth and grooves I5 in the base I.

The teeth and grooves formed in the base are fixed in such position relative to the sets of deiorming dies that when the toothed edge I5 seats in one of the grooves in the base a selected set of deforming dies will be accurately alined with the ejection chute E. The action of the spring I2 will cause the tooth-like edge I6 to slide into the bottom of one or another of the grooves formed in the base. 'I'he tooth-like edge I6 will not, under ordinary usage, rest upon the toothed pait formed in the base. Thus, it is insured that no matter in what manner the operator of the device moves the lanvil 5 relative to the base it will automatically adjust itself in a position in y which one set of deforming dies isaccurately alined.

.To facilitate the movement of the anvil relative to the base I, it may be provided with laterally extending ilng'er pieces I 'I and IIa which project beyond the lateral surfaces of .the yhousing 3 and are readily accessible to the operator.

vIn the modification shown in Figure 7, the tongues I0 and IDP- projecting through the base I may be threaded and a washer IB and nut I9 may be used on each tongue to lock the anvil 5 rigidly. The anvil 5 may be adjusted by partly loosening the nuts I9, moving it to selected position and tightening the nuts.

While constructions in which this invention may be embodied have been shown and described, it is to be understood that these constructions have been selected merely for the purpose of illustration or example and that various changes in the size, shape and arrangement of the parts may be made without departing from the spirit of the invention or the scope of the subjoined claims. Y

The invention claimed is:

l. In a stapling machine, the combination of a base, an anvil provided with two different types of elongated clenching recesses, means for supporting said anvil on said base for movement transversely of the direction of the lengths of said recesses, said means comprising downwardly extending lugs formed on said anvil operating in elongated slots formed in said base, and means carried by said lugs and cooperating with said base for holding said anvil in either of its positions of adjustment. y

2. In a stapling device, a base, a staple driving part, an anvil having a plurality of differently acting staple deforming dies, said anvil movably mounted on said base, means coacting between said anvil and base to constrain vsaid anvil to move longitudinally of said base and in alinement with said driving part, tooth and groove means, and a spring acting to cause said tooth and groove means to move said anvils so thatv one ofA said deforming dies is in alinement with said driving part.

3. In a stapling machine, a base, an anvil slidably mounted thereon and constrained to move longitudinally thereof, inclined tooth and notch means acting 'to locate said anvil in different positions in relation to said base, and spring means causing said inclined tooth and notch means to move said anvil into proper alined position. 1

4. In a stapling machine, a base, an anvil slidably mounted thereon, elongated slots in'said base, said anvil having parts cooperating with said slots and slidable therein, and means associated with said anvil to lock said anvil to said base in selected positions within the range of said slots.

5. In a stapling device, a base, staple driving mechanism carried by said base, an anvil movably mounted on said base and having a plurality of different sets of clenching cavities, said anvil being constrained to move longitudinally of said base and transversely of the longitudinal lengths of said clenching cavities, inclined plane and rider means operative to cause the movement of said anvil and position the same with a respective set of clenching cavities in operative relation to said driving mechanism; and spring means cooperable with said means to maintain said anvil in a selected position.

WILLIAM G. PANKONIN.' 

